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United States Patent | 5,764,653 |
Wuidart | June 9, 1998 |
In an integrated circuit, a detector of information coherency is associated with a circuit for the storage of information. The detector includes a reference circuit that has the same structure as the storage circuit. The reference circuit contains complementary information under normal circumstances. A checking circuit of the detector verifies the complementary nature of the information in the reference circuit and detects disturbing phenomena that cause incoherence in the information contained in the storage circuit.
Inventors: | Wuidart; Sylvie (Le Cade, FR) |
Assignee: | SGS-Thomson Microelectronics S.A. (Saint Genis, FR) |
Appl. No.: | 618921 |
Filed: | March 20, 1996 |
Mar 21, 1995[FR] | 95 03293 |
Current U.S. Class: | 714/718 |
Intern'l Class: | G11C 029/00 |
Field of Search: | 371/21.1,21.2,21.4,67.1,70,71 365/189.07,190,201,202 324/76.11,151.1,158 R |
4395767 | Jul., 1983 | Van Brunt et al. | 371/25. |
4747043 | May., 1988 | Rodman | 364/200. |
5063516 | Nov., 1991 | Jamoua et al. | 364/431. |
5077521 | Dec., 1991 | Langford, II et al. | 324/158. |
5440234 | Aug., 1995 | Kondo | 324/526. |
5551006 | Aug., 1996 | Kulkarni | 395/473. |
5572720 | Nov., 1996 | Reed et al. | 395/555. |